BIOCHEMISTRY LRHS BIOLOGY 2015-16

Learning Objectives We will describe and compare the structures and functions of the 4 major biomolecules: carbohydrates, lipids, proteins, and nucleic acids. I will use Cornell notes, and a graphic organizer to describe & compare the structures and functions of the 4 major biomolecules: carbohydrates, lipids, proteins, and nucleic acids.

Key Vocabulary Words Biomolecule Fatty acids Macromolecule Lipids Monomer Nucleic acids Polymer Protein Organic Carbohydrate inorganic Peptide bond Hydrolysis Amino acids Saccharide

AGENDA Bell Ringer Hook: blocks Writing Cornell Notes: Format & Overview Biomolecules Notes Exit Ticket: Graphic Organizer ex. Table, Bubble map, etc.

Hook With your table partners use the rings to create the following: 1. A Single chain 2. a chain with 3 tails of equal length 3. a ladder like chain

Cornell Notes Format

MACROMOLECULES Macromolecules – “Giant molecules” made from smaller molecules Formed by a process known as polymerization, in which large compounds are built by joining smaller ones together. The smaller units, or monomers, join together to form polymers.

Polymers Artificial polymers include such plastics as polyethylene, styro foam, and Saran wrap; fibers such as nylon, Dacron (polyester), and rayon; and other materials such as Formica, Teflon, and PVC pipe.

Ex. What are macromolecules? How does polymerization occur? Cornell Notes Essential Questions Ex. What are macromolecules? How does polymerization occur? KEY WORDS Macromolecule “aka” Biomolecule Polymerization Monomer Polymer

Four types of Macromolecules (organic compounds) Biological molecules ‘AKA” Macromolecules Carbohydrates Lipids Proteins Nucleic Acids So..How are macromolecules made? How are they broken down into their____?

BUILDING AND DIGESTING MACROMOLECULES Removal of H2O Addition of H2O

ORGANIC MOLECULES Carbohydrates Lipids Nucleic Acids Proteins Let’s compare the structure & functions of these Four groups of organic compounds found in living things: Carbohydrates Lipids Nucleic Acids Proteins Cornell Notes Essential Questions Structure-What are they made up of ( which monomers)? Functions-What are their uses? -What are examples?

CARBOHYDRATES CarbOhydrates - Compounds made up of carbon, hydrogen, and oxygen atoms Usually in a ratio of 1 : 2 : 1.

Uses of Carbohydrates Living things use carbohydrates as: Main source of energy (starches and sugars) Plants and some animals also use carbohydrates for structural purposes

Uses of Carbohydrates Animals Plants Store excess sugar in the form of glycogen Plants Store excess sugar in the form of starch Use tough, flexible cellulose fibers to give them their strength and rigidity

Sugars are put into 3 categories: Monosaccharides - Single sugar molecules Examples: Glucose, Galactose, Fructose Disaccharides – Double sugar molecules Examples: Glucose + Fructose = Sucrose Glucose + Galactose = Lactose Glucose + Glucose = Maltose Polysaccharides – More than two sugar molecules Examples: Starch, Cellulose, Chitin, Glycogen

In your Hook: Which building block was your lipids? Structure of Lipids Made up mostly from carbon and hydrogen atoms Glycerol molecule + 3 fatty acids In your Hook: Which building block was your lipids?

LIPIDS Common categories of lipids are Functions: Fats Oils Waxes Functions: Can be used to store energy Some lipids are important parts of biological membranes and waterproof coverings Can serve as chemical messengers (steroids only) Generally not soluble in water

Saturated and Unsaturated Lipids Saturated - If each carbon atom in a lipid's fatty acid chains is joined to another carbon atom by a single bond. “saturated” is used because the fatty acids contain the maximum possible number of hydrogen atoms Unsaturated - If there is at least one carbon-carbon double bond in a fatty acid. Examples - Corn oil, sesame oil, canola oil, and peanut oil

Learning Check Which one of these fatty acids are Saturated and which is Unsaturated?

Learning Check Which one of these fatty acids are Saturated and which is Unsaturated?

Nucleic Acids Nucleic acids - Macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus. Made up of repeating units called nucleotides Each nucleotide contains: 5-Carbon Sugar Phosphate Group Nitrogenous Base

Which building block was this? Nucleic Acids Which building block was this? Function: Store genetic information Transmit genetic information Made up of : Nucleotides Phosphate backbone Two Kinds of Nucleic Acids: Ribonucleic acid (RNA) Contains the sugar ribose Deoxyribonucleic acid (DNA) Contains the sugar deoxyribose

What are the monomers of protein called? Proteins - Macromolecules that contain nitrogen as well as carbon, hydrogen, and oxygen. Made up of chains of amino acids folded into complex structures. Amino Acids - Compounds with an amino group (−NH2) on one end and a carboxyl group (−COOH) on the other end. What are the monomers of protein called?

Amino Acids There are only 20 different amino acids. Any amino acid may be joined to any other amino acid by bonding an amino group to a carboxyl group. This bond is called a peptide bond.

Functions of Proteins Each protein has a specific role. Some proteins control the rate of reactions and regulate cell processes. Some are used to form bones and muscles. Others transport substances into or out of cells or help to fight disease.

Product/Extension In your unit Guide, Complete Chapter 2 Questions 1, 2, & 3

Example Analogy for polymer A polymer is like a freight train with many cars. Each car is a monomer. A polymer is like a string of pearls. Each pearl is a monomer.

Homework Complete Summary Section of Today’s Cornell Notes.

STOP!